define iridium
b98157aa39a29a2b4ebab1b0b477d491
Definitions &Translations Iridium(noun) a rare metallic element, of the same group as platinum, which it much resembles, being silver-white, but harder, and brittle, and indifferent to most corrosive agents. With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. Symbol Ir. Atomic weight 192.5.
67e5b84d2ccc1740d50fb1af5f2f022d
METAL (metalled, metalling) 1. iridium-a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium. atomic number 77, Ir. metal, metallic element-any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
ad862e8b1b6c9e1407cbd0952b6828b0
Isotope-ratio mass spectrometry Isotope-ratio mass spectrometry (IRMS) is a specialization of mass spectrometry, in which mass spectrometric methods are used to measure the relative abundance of isotopes in a given sample. This technique has two different applications in the earth and environmental sciences.his method can be used for 'stable isotope' analysis of light gases (as above), but it is particularly used in the isotopic analysis of noble gases (= rare or inert gases) for radiometric dating or isotope geochemistry.
eb3f19dd87cc66fca19bd1400d8863c6
- A very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium) based on measured density, although calculations involving the space lattices of the elements show that iridium is denser.ridium is one of the rarest elements in Earth's crust, with annual production and consumption of only three tonnes. 191 Ir and 193 Ir are the only two naturally occurring isotopes of iridium, as well as the only stable isotopes; the latter is the more abundant of the two.
26217b961f4f9953072042e9146d6e73
Rubidium Template:Infobox rubidium Rubidium (Template:PronEng, Template:Respell) is a chemical element with the symbol Rb and atomic number 37. Rb is a soft, silvery-white metallic element of the alkali metal group. this is wrong.= Characteristics ==Rubidium is the second most electropositive hydrogen. Rubidium has also been reported to ignite spontaneously in air. Also like other alkali metals, it forms amalgams with mercury and it can form alloys with gold, caesium, sodium, and potassium.
d6587bf43c7fc5bf61dc644646b417f3
irradiation Definition of irradiation. 1  1 : exposure to radiation (as X-rays or alpha particles) 2  2 : the application of radiation (as X-rays or gamma rays) for therapeutic purposes or for sterilization (as of food); also : partial or complete sterilization by irradiation.
6b2ce7e6938a85b638ed1bc67067c925
iris Plural irises or irides (ī'rĭ-dēz', ĭr'ĭ-) The colored, muscular ring around the pupil of the eye in vertebrate animals, located between the cornea and lens. Contraction and expansion of the iris controls the size of the pupil, thereby regulating the amount of light reaching the retina.
14d0bcef963ed7dfac74644c2ec3d59b
iridescent adjective. 1  Producing a display of lustrous, rainbowlike colors: an iridescent oil slick; iridescent plumage. 2  Brilliant, lustrous, or colorful in effect or appearance: “The prelude was as iridescent as a prism in a morning room” ( Carson McCullers )
d3ade0da8410bacefbca1e2da8b6bbc7
- 1 The Element Iridium in Chemistry The element iridium is a platinum group metal that is a very durable, hard, and lustrous metal and is similar to platinum.2  It is well known for being the most corrosive and r…. The Element Iridium in Chemistry The element iridium is a platinum group metal that is a very durable, hard, and lustrous metal and is similar to platinum. 2  It is well known for being the most corrosive and r….
7a1aabf2c1b73c387de86caf77135e50
Ruthenium Ruthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. The Baltic German scientist Karl Ernst Claus discovered the element in 1844, and named it after Ruthenia, the Latin word for Rus' .
5bdb06fc8ac4c462aaaa45b4e1c0ec31
Iridium The pigment iridium black, which consists of very finely divided iridium, is used for painting porcelain an intense black; it was said that all other porcelain black colors appear grey by the side of it.ridium is one of the rarest elements in Earth's crust, with annual production and consumption of only three tonnes. 191 Ir and 193 Ir are the only two naturally occurring isotopes of iridium, as well as the only stable isotopes; the latter is the more abundant of the two.
2c9e2103f611201f96199bb1f86b4527
- Ir, Rh, Re, Au, Pd, Pt, and Ag stand for iridium, rhodium, rhenium, gold, palladium, platinum, and silver respectively. These figures are at best educated guesses, but according to most sources iridium is the clear winner.
14e844b8b3fb2b520f3261c5ff391f72
infrared infrared in·fra·red (ĭn'frə-rěd') adj. Of or relating to the range of invisible radiation wavelengths from about 750 nanometers, just longer than red in the visible spectrum, to 1 millimeter, on the border of the microwave region. Generating, using, or sensitive to infrared radiation. n. Infrared light or the infrared part of the spectrum.
a793051fb22c0e95717e62c3f94c57cc
Iridium A very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium) based on measured density, although calculations involving the space lattices of the elements show that iridium is denser.he discovery of iridium is intertwined with that of platinum and the other metals of the platinum group. Native platinum used by ancient Ethiopians and by South American cultures always contained a small amount of the other platinum group metals, including iridium.
fc13eae95cfcc2bcb21c51fbdf144a5c
Rubidium Template:Infobox rubidium Rubidium (Template:PronEng, Template:Respell) is a chemical element with the symbol Rb and atomic number 37.Rb is a soft, silvery-white metallic element of the alkali metal group. this is wrong.emplate:Infobox rubidium Rubidium (Template:PronEng, Template:Respell) is a chemical element with the symbol Rb and atomic number 37.
e2447d1cf8d3b6b61b975b871f38198b
What is Iridium? Iridium is a metallic element with the atomic number 77 and the symbol Ir. On the periodic table of elements, it is found in Group 9, between platinum and osmium. It is referred to as a “transition metal” and also as a “platinum metal,” along with ruthenium, rhodium, palladium, osmium, and platinum itself.
40d3f089453bc46fbada527a0d1cf609
irradiation irradiation. n. 1. (General Physics) the act or process of irradiating or the state of being irradiated.2. (General Physics) the apparent enlargement of a brightly lit object when it is viewed against a dark background.3. a shaft of light; beam or ray. 4. (Medicine) med.r·ra·di·a·tion. n. 1. The act of exposing or the condition of being exposed to radiation. 2. The use or application of ionizing radiation, especially in medical treatment and for the sterilization or preservation of food.
c4ad745b6d8049fd0fa9afbb97ecfff6
infrared IR. 1. Of or relating to electromagnetic radiation between microwaves and red visible light in the electromagnetic spectrum, having frequencies between 300 gigahertz and 400 terahertz and wavelengths between 1 millimeter and 750 nanometers. 2. Generating, using, or sensitive to infrared radiation.. Of or relating to electromagnetic radiation between microwaves and red visible light in the electromagnetic spectrum, having frequencies between 300 gigahertz and 400 terahertz and wavelengths between 1 millimeter and 750 nanometers. 2. Generating, using, or sensitive to infrared radiation.
51380746c79b5b385f63ebf5f33a4b7b
Iridium Element Facts A very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium) based on measured density, although calculations involving the space lattices of the elements show that iridium is denser.
9bd4c5defe5fd86335dad1773e78cae5
Iridium A member of the platinum group metals, iridium is white, resembling platinum, but with a slight yellowish cast. Because of its hardness, brittleness, and very high melting point, solid iridium is difficult to machine, form, or work, thus powder metallurgy is commonly employed, instead.he discovery of iridium is intertwined with that of platinum and the other metals of the platinum group. Native platinum used by ancient Ethiopians and by South American cultures always contained a small amount of the other platinum group metals, including iridium.
063e68c8953ae4c845111b74f72bb73c
It's Elemental Iridium and osmium were identified in the black residue remaining after dissolving platinum ore with aqua regia, a mixture of 25% nitric acid (HNO 3) and 75% hydrochloric acid (HCl). Today, iridium is still obtained from platinum ores and as a by-product of mining nickel.Pure iridium is very brittle and is nearly impossible to machine. It is primarily used as a hardening agent for platinum.Platinum-iridium alloys are used to make crucibles and other high temperature equipment. Iridium is also alloyed with osmium to make the tips of fountain pens and compass bearings.Iridium is the most corrosive resistant metal known.ure iridium is very brittle and is nearly impossible to machine. It is primarily used as a hardening agent for platinum. Platinum-iridium alloys are used to make crucibles and other high temperature equipment.
5ef9aa02f308bec8a6d80d6d4efa1771
- Iridium is a stable metal that chemically unreactive, like platinum and gold. Iridium is the most resistant to oxidation of all metals. It can be used is as a hardening agent in alloys with Platinum and Osmium. Sometimes used in medical therapies e.g. treating prostate cancer by radiation therapy.
7161707794b80be12e4f85966ef6ee15
Rubidium - Rb Rubidium is a soft, silvery-white metallic element of the alkali metals group (Group 1). It is one of the most electropositive and alkaline elements. Rubidium can be liquid at ambient temperature, but only on a hot day given that its melting point is about 40°C.
bb534da913ba775c0143e03975ef96aa
What's the difference between Oakley iridium lenses and polarized lenses? Iridium refers to the reflective coating on the lenses whereas polarised is a propert of the lens itself. For example; 'black iridium polarised' means that the lens is coated with black iridium (a sort of dark silver finish) and the lens will be grey polarised.
ffae87e3207082123823b893670e61ad
- iridium-a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium. atomic number 77, Ir. metal, metallic element-any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
824a265917cae4f071ed29d89a55b88e
- Definition of scandium. : a silvery-white metallic element found widely especially in association with rare earth elements and used especially in alloys and in high-intensity electric lamps — see element table.